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x86/percpu: Refer __percpu_prefix to __force_percpu_prefix

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Refer __percpu_prefix to __force_percpu_prefix to avoid duplicate
definition. While there, slightly reorder definitions to a more
logical sequence, remove unneeded double quotes and move misplaced
comment to the right place.

No functional changes intended.

Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: H. Peter Anvin <hpa@zytor.com>
Link: https://lore.kernel.org/r/20250411093130.81389-1-ubizjak@gmail.com
This commit is contained in:
Uros Bizjak 2025-04-11 11:31:17 +02:00 committed by Ingo Molnar
parent 7615b94b63
commit d51faee4bd
1 changed files with 11 additions and 9 deletions
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20
arch/x86/include/asm/percpu.h
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@ -29,6 +29,8 @@
#ifdef CONFIG_SMP
#define __force_percpu_prefix "%%"__stringify(__percpu_seg)":"
#ifdef CONFIG_CC_HAS_NAMED_AS
#ifdef __CHECKER__
@ -36,23 +38,23 @@
# define __seg_fs __attribute__((address_space(__seg_fs)))
#endif
#define __percpu_prefix
#define __percpu_seg_override CONCATENATE(__seg_, __percpu_seg)
#define __percpu_prefix ""
#else /* !CONFIG_CC_HAS_NAMED_AS: */
#define __percpu_prefix __force_percpu_prefix
#define __percpu_seg_override
#define __percpu_prefix "%%"__stringify(__percpu_seg)":"
#endif /* CONFIG_CC_HAS_NAMED_AS */
#define __force_percpu_prefix "%%"__stringify(__percpu_seg)":"
#define __my_cpu_offset this_cpu_read(this_cpu_off)
/*
* Compared to the generic __my_cpu_offset version, the following
* saves one instruction and avoids clobbering a temp register.
*
*/
#define __my_cpu_offset this_cpu_read(this_cpu_off)
/*
* arch_raw_cpu_ptr should not be used in 32-bit VDSO for a 64-bit
* kernel, because games are played with CONFIG_X86_64 there and
* sizeof(this_cpu_off) becames 4.
@ -77,9 +79,9 @@
#else /* !CONFIG_SMP: */
#define __force_percpu_prefix
#define __percpu_prefix
#define __percpu_seg_override
#define __percpu_prefix ""
#define __force_percpu_prefix ""
#define PER_CPU_VAR(var) (var)__percpu_rel
@ -97,8 +99,8 @@
# define __my_cpu_var(var) (*__my_cpu_ptr(&(var)))
#endif
#define __percpu_arg(x) __percpu_prefix "%" #x
#define __force_percpu_arg(x) __force_percpu_prefix "%" #x
#define __percpu_arg(x) __percpu_prefix "%" #x
/*
* For arch-specific code, we can use direct single-insn ops (they